Answer:
From your question the boats are 2 miles apart from each other
Y is directly proportional to x and therefore takes the form y=kx where k is the constant of proportionality.
Dividing both sides by x for the given values, k becomes 18/4 = 4.5
The equation is y=mx+c where m is the gradient and c is the y-intercept
Answer:
6
Step-by-step explanation:
y=2x+4
y=2(1)+4
y=2+4
y=6